A lot of the talk surrounding the recent presidential campaign was about judgement. Did Obama's connection with Bill Ayers show bad judgment? Was McCain's selection of Sarah Palin as his running made poor judgment?
Actually, everything is about judgement. We use judgement constantly, all day every day. Everything we do voluntarily, from getting out of bed to making business decisions, involves judgement. In fact, the new field of behavioral economics has much to say about how our conscious and unconscious brains collaborate in this decision-making process. The long and short is that our judgement is not always rational, and there are a host of biological and environmental factors that contribute to how we choose.
So, given that our judgement is so subjective and fragile, doesn't it make sense to use objective data and criteria when possible? Heck, even baseball now uses instant replay to augment the umpire's decision-making.
So shouldn't DNA evidence, where available, be a right of accused and convicted people in criminal cases.